Mutations arise from A) mistakes in copying DNA from a parent when eggs or sperm are made. B) exchanging of proteins during fertilization. C) encoding of ribosomes during DNA generation. D) faulty functioning of amino acid

Explain why phospholipid molecules form a bilayer. (3 marks)

In which situations is the principle of cross-cutting relationship useful in determining relative age?

Which set of characteristics best describes sedimentary rock? a) largest type of rock, made of organic matter, hardest type of rock b) often contains layers, forms near sources of water, contains fossils c) least abundant type of rock, made of other rocks, made mostly of minerals d) most abundant type in earth's crust, made of magma/lava, contains no fossils